Overheating—Its Decisive Role in Phosphating

摘要

Phosphating, the most widely used metal pretreatment process for the surface treatment and finishing of ferrous and nonferrous metals, though it dates back to ancient Egyptian times, has experienced numerous modifications. A review of the literature clearly reveals that most of these modifications have concerned the development of formulations that would yield coatings to suit different end uses; however, the improvements made to overcome the problems associated with the operation of phosphating baths have been scarce and the majority of the problems still demand a critical solution. One of the prominent operational problems faced in the phosphating industry is that of overheating, which forms the subject of this article.